SU1292340A2 - Device for preparing amalgam - Google Patents

Description

The invention relates to dental equipment, in particular for the preparation of amalgams during dental work.

The aim of the invention is to improve the performance of the device and simplify its maintenance by simplifying and speeding up the installation of the control knob at the required positions.

FIG. 1 shows the proposed device, a vertical section; in fig. 2 - view A of FIG. I.

The device has a housing 1 mounted on a bracket 2, and bunkers 3 and A for alloy powder and mercury, respectively. The inlet and outlet openings 5 and 6 of housing 1 are separated by a camshaft 7 with calibrated containers 8 and 9, respectively, for alloy powder and for mercury. The shaft 7 is provided with a control knob 10. The outlet openings 6 of the housing 1 are connected through a receiving chamber 11 rigidly connected to the housing, the cylindrical end of which enters the undercut of the mixing tube 12. The joint is sealed by a gasket 13. The mixing tube 12 is connected through the plate 14 to the connecting rod 15, and through it by means of the crank 16 - with the shaft of the electric motor 17 mounted on the base 18. The mixing tube 12 can be rotated, for which a metal axis 19 is provided. At the end of the mixing tube 12 there is a screwed capsule 20. On the bracket 2 mounted on the base 18, a relay 21 is mounted with a handle 22. The setting of the exposure time controls the operation of the electric motor 17. A microswitch 23 that starts the time relay 21 is attached to the housing 1. A button 24 is installed in the slot of the control handle 10 start-up with a spring 25, at- tfBM at the moment of connecting the calibrated tank 8 to the hopper 4, the button 24 is located opposite the stem mic-. key switch 23. The control handle 10 is made in the form of a disk, on a cylindrical surface of which a groove 26 is diametrically located, determining the position of the alloy powder dosing and turning on the mixer drive, and the groove 27 determining

mercury dosing position. The grooves 26 and 27 have stops, respectively, turning the handle 10 of the control 28 and 29, fixing the handle 10 of the control is carried out using a lock 30 with a spring roller 32, which constantly presses the roller 31 of the lock 30 of the surface 0 of the control handle 10. The fixture 30 is located in the guide sleeve 33 attached to the bracket 2.

To prevent mercury and its vapor from entering the gap between the 5 mating surfaces of the camshaft 7 and the metering housing 1 into the container 8 of the alloy powder and the surrounding space, sealing gaskets 0 34 are installed in the grooves of the camshaft 7.

The device works in the following way.

Bins 3 and 4 of case I are filled with 5 mixing components. Knob 22 sets the required mixing time. By pressing the button 24 on the rod of the microswitch 23, time switches 21 and 30 start the electric motor 17, and the button 24 can be released and return to the initial position by the spring 25. The crank 16 and the connecting rod 15 will prevent the rotational movement motor shaft 17 in the oscillatory motion of the mixing tube 12, while the vibration occurring during operation contributes to a more .Q complete filling of the calibrated capacity 8 with alloy powder. I

Control knob 10 is turned

180 clockwise, with the roller 31 of the clamp 30 coming out of pa5 for 26, lifting together with the clamp 30 along the guide bushing 33 and compressing the spring 32. Exiting the groove 26, the roller 31 rolls around the surface of the control handle 10 until it stops at

The Q rotation limiter 29 of the slot 27. Thus, the calibrated container 8 is precisely connected through the outlet 6 to the opening of the receiving chamber 11, the powder enters the mixing tube I2 and under the action of the centripetal acceleration created by the electric motor 17 when it is operated 17 same time

Tank 9 is connected to mercury tank 4. After holding for 1 s, the control knob is turned to its original position, while the roller 31 of the retainer 30 emerges from the groove 27 and rolls along the forming surface of the control knob 10 until it stops at the rotation stop of the groove 26. Thus, the calibrated container 9 is precisely connected through the outlet 6 with a hole in the receiving chamber 11, mercury enters the mixing tube 12, catches up with the powder, envelops it, facilitating a more complete delivery of the powder of the alloy of the mixing site. After stopping the rotation of the motor J7 of the mixer, the capsule 20 is unscrewed and a lump of amalgam is ready for use.

The technical advantage of the proposed device is a reduction in cooking time.

amalgam by reducing the time to install the control knob in the position of metering components by 8-9 s, as well as increased convenience during operation, due to the release

the physician from having to follow the correct installation of the control knob in the dosing positions of the components.

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31 28

Compiled by A. Lyutikov Editor E. Kravtsov Tehred M.Didk. Proofreader. Cherni

Order 775 Circulation 593 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (2)

1. DEVICE FOR PREPARING AMALGAM by ed. St. No. 1213080, characterized in that, in order to increase productivity and simplify maintenance, the control handle is made in the form of a disk with grooves made diametrically on a cylindrical surface, and the latch is made with a roller in contact with the grooves and the cylindrical surface of the disk, and the grooves are located in the diametrical a plane passing through calibrated containers. 2. The device according to p. ^ Characterized in that the grooves are made in the cross section triangular with an angle at the base equal to the difference between the angle 90 and the angle of friction between the roller and the disk. 1292340 A2